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首页> 外文期刊>Nordic hydrology >Modifying Hargreaves-Samani equation with meteorological variables for estimation of reference evapotranspiration in Turkey
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Modifying Hargreaves-Samani equation with meteorological variables for estimation of reference evapotranspiration in Turkey

机译：用气象变量修改Hargreaves-Samani方程以估算土耳其的参考蒸散量

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摘要

The Food and Agriculture Organization advocates the Penman-Monteith (FAO-56 PM) equation as the standard model for estimation of the reference evapotranspiration (ET_0) because it is considered to have better accuracy. However, in regions where meteorological variables such as solar radiation, wind speed, and relative humidity are not gauged, the Hargreaves-Samani (HS) equation is resorted to as an alternative simply because it needs minimum and maximum air temperatures only as the explanatory variables. In this study, first the HS equation is applied to the monthly means of measured temperature data recorded at 275 meteorology stations in Turkey. Next, the coefficients of the HS equation are calibrated using the ET_0 values given by the FAO-56 PM equation at all these stations. Next, the HS equation is modified by adding the wind speed as an extra explanatory variable, separately in each one of seven geographical regions of Turkey, which is observed to yield smaller error statistics as compared to the original HS equation. It is concluded that for estimation of the ET_0 in regions where meteorological measurements are scarce, the HS equation modified in a similar manner can be used with better precision.
机译：粮食及农业组织主张将Penman-Monteith（FAO-56 PM）方程作为估计参考蒸散量（ET_0）的标准模型，因为它被认为具有更高的准确性。但是，在未测量气象变量（例如太阳辐射，风速和相对湿度）的区域，仅使用Hargreaves-Samani（HS）方程作为替代，因为它只需要最低和最高气温作为解释变量。 。在这项研究中，首先将HS方程应用于土耳其275个气象站记录的每月测得的温度数据。接下来，在所有这些站点上使用FAO-56 PM方程给出的ET_0值对HS方程的系数进行校准。接下来，通过在土耳其的七个地理区域中的每个地理区域分别添加风速作为额外的解释变量来修改HS方程，与原始的HS方程相比，观察到的误差统计值较小。结论是，对于在气象测量缺乏的区域中的ET_0的估计，可以以更高的精度使用以类似方式修改的HS方程。

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  • 来源
    《Nordic hydrology》 |2017年第2期|480-497|共18页
  • 作者

    Murat Cobaner; Hatice Citakoğlu; Tefaruk Haktanir; Ozgur Kisi;

  • 作者单位

    Department of Civil Engineering, Erciyes University, Talas/Kayseri 38039, Turkey;

    Department of Civil Engineering, Erciyes University, Talas/Kayseri 38039, Turkey;

    Department of Civil Engineering, Erciyes University, Talas/Kayseri 38039, Turkey;

    Department of Civil Engineering, Canik Basari University, Samsun 55105, Turkey;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    calibration; evapotranspiration; HS equation; Penman-Monteith;

    机译：校准;蒸散HS方程;彭曼·蒙特斯;

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